Inner tube



W. J. BOWMAN INNER TUBE May 17,1927.v 1,628,642.

Filed AuZ. 18. 1924 attorney vPatented Mav 17, 1927.

UNITED STATES WILLIAM J. Bowman, F SMITH CENTER, KANSAS. i

TNNEB. TUBE appncaunn" mea August 1s, 1924. serial No. 732,861.

The device forming thesubject matter of 4 this application is an inner tube for vehicle tires, and the invention aims to provide a simple but efiicient vmeans whereby the tube will be rendered practically puncture proof,

without interfering appreciably with the resilienc of the tube. v

In t e accompanyin drawings:- Eigure 1 shows in si e elevation, a portion 1o ot the device constructed in accordance with the invention; Figure 2 is a transverse section; Figure 3 is afragmental longitudinal or circumferential section; and Figure 4 is a section on the line 4--4 of Figure 3, on 1I, a greatly enlarged scale.

The 'drawing shows'an inner tube '1 of rubber, for-use in a vehicle tire, and a puncture-resisting armori'or the tube, the armor comprising a pluralityl of rubber blocks 2,

2o the rubber of Which'is harder than'the con- 4stituent rubber of the 'tube' 1, and hard enough to resist puncture. Adhesive ma-l terial 5 on the inner surfaces of all of the lblocks 2 secures them to the outer surfacel of the tube 1, the blocks being located so block. The blocks 2 are spaced far enou-gh apart, as indicated at 4, about the periphery f blocks and securing them to the outer surface.

klof every one of them, so that, When secured 5.0 of the tube, the blocks being located sov closely together, about their entire peripheries, that they present aI practically continuous anti-punctu-ring surface: every one of the blocks being free about its entire periphery, the peripheral surfaces of each of the blocks being disposed at right angles .to the outer surface of the tube, throughout the entire periphery of each block, and the' blocks being spaced far enough apart, about when. secured to the tube as aforesaid, each block ma move with the tube, and radially of the tube, without engaging an adjoining block in overlapped relation thereto.

In testimony that I claim the fore oing as lny own, I have hereto aiiixed my signature.

, WILLIAM J. BOWMAN.,

.the periphery of every one of them, so that, 

